EP1124805B1 - Method for producing 4-[(2',5'- diamino-6'- halopyrimidine- 4'-yl)amino]- cyclopent- 2-enylmethanols - Google Patents

Method for producing 4-[(2',5'- diamino-6'- halopyrimidine- 4'-yl)amino]- cyclopent- 2-enylmethanols Download PDF

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EP1124805B1
EP1124805B1 EP99971416A EP99971416A EP1124805B1 EP 1124805 B1 EP1124805 B1 EP 1124805B1 EP 99971416 A EP99971416 A EP 99971416A EP 99971416 A EP99971416 A EP 99971416A EP 1124805 B1 EP1124805 B1 EP 1124805B1
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diamino
amino
cyclopent
enylmethanols
general formula
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EP1124805A1 (en
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Walter Brieden
Elie Saikali
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Lonza AG
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
    • C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
    • C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
    • C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
    • C07D239/46—Two or more oxygen, sulphur or nitrogen atoms
    • C07D239/50—Three nitrogen atoms

Definitions

  • the present invention relates to a new process for the preparation of 4 - [(2 ', 5'-diamino-6'-halopyrimidin-4'-yl) amino] cyclopent-2-enylmethanols of the general formula 4 - [(2 ', 5'-diamino-6'-halopyrimidin-4'-yl) amino] cyclopent-2-enylmethanols are important intermediates for the preparation of antiviral nucleotide derivatives (WO 91/01310).
  • the reaction is carried out in the presence of an alkali or alkaline earth metal carbonate or Alkali or alkaline earth metal bicarbonate carried out as a base.
  • Alkali metal carbonate or alkali metal bicarbonate can sodium and Potassium carbonate or sodium or potassium hydrogen carbonate can be used.
  • Alkaline earth metal carbonate or alkaline earth metal hydrogen carbonate can calcium or Magnesium carbonate or calcium hydrogen carbonate can be used.
  • an alkali metal bicarbonate such as Sodium bicarbonate performed.
  • the reaction is expedient at a temperature of 20 ° C to Reflux temperature of the corresponding solvent, preferably from 50 ° C to Reflux temperature.
  • the 4-aminocyclopent-2-enylmethanol are useful and the 2,5-diamino-4,6-dihalopyrimidine used equimolar.
  • the end products can then be used according to Formula I, preferably the (1S, 4R) -4 - [(2 ', 5'-diamino-6'-halopyrimidin-4'-yl) amino] cyclopent-2-enylmethanol, can be obtained by conventional workup methods.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Pyridine Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention relates to a novel method for producing 4- [(2',5'-diamino- 6'-halopyrimidine- 4'-yl)amino]- cyclopent- 2-enylmethanols of general formula (I), wherein X represents a halogen atom. According to the inventive method, a 2,5-diamino-4,6-halopyrimidine of general formula (II), wherein X has the aforementioned meaning, is reacted with a 4- aminocyclopent-2- enylmethanol of formula (III) or with a salt thereof in the presence of a base in a polar protic solvent.

Description

Die vorliegende Erfindung betrifft ein neues Verfahren zur Herstellung von 4-[(2',5'-Diamino-6'-halogenpyrimidin-4'-yl)amino]cyclopent-2-enylmethanolen der allgemeinen Formel

Figure 00010001
4-[(2',5'-Diamino-6'-halogenpyrimidin-4'-yl)amino]cyclopent-2-enylmethanole sind wichtige Zwischenprodukte zur Herstellung von antiviralen Nukleotidderivaten (WO 91/01310).The present invention relates to a new process for the preparation of 4 - [(2 ', 5'-diamino-6'-halopyrimidin-4'-yl) amino] cyclopent-2-enylmethanols of the general formula
Figure 00010001
4 - [(2 ', 5'-diamino-6'-halopyrimidin-4'-yl) amino] cyclopent-2-enylmethanols are important intermediates for the preparation of antiviral nucleotide derivatives (WO 91/01310).

Bekannt ist die 3-stufige Synthese von 4-[(2',5'-Diamino-6'-chlorpyrimidin-4'yl)amino]cyclopent-2-enylmethanol ausgehend von 4-Acetamidocyclopent-2-enylmethanol durch Umsetzen mit 2-Amino-4,6-dichlorpyrimidin in Butanol mittels Diisopropylethylamin als Base. Dabei wird zunächst das [(2'-Amino-6'-chlorpyrimidin-4'-yl)amino]cyclopent-2-enylmethanol gebildet, welches dann in einer Folgestufe mittels Diazotierung in das entsprechende Amin überführt wird, das dann zum Endprodukt hydrolysiert wird (J. Chem. Soc. Perkin. Trans., 1, 1992, 589-592; EP-A-0 434 450). Dieses Verfahren hat den Nachteil, dass es zu kostspielig ist und das gewünschte Endprodukt nur in mässiger Ausbeute erhalten wird.The 3-stage synthesis of 4 - [(2 ', 5'-diamino-6'-chloropyrimidin-4'yl) amino] cyclopent-2-enylmethanol is known starting from 4-acetamidocyclopent-2-enylmethanol by reaction with 2-amino-4,6-dichloropyrimidine in butanol using diisopropylethylamine as a base. First, the [(2'-amino-6'-chloropyrimidin-4'-yl) amino] cyclopent-2-enylmethanol formed, which then in a subsequent stage by means of diazotization in the corresponding amine is transferred, which is then hydrolyzed to the end product (J. Chem. Soc. Perkin. Trans., 1, 1992, 589-592; EP-A-0 434 450). This procedure has the Disadvantage that it is too expensive and the desired end product only in moderate Yield is obtained.

M. Legraverend et al. (Synthesis, 1990, 587-589) beschreiben die Herstellung von 3-(2,5-Diamino-6-chlorpyrimidin-4-yl)amino-5-(hydroxymethyl)cyclopentan-1,2-diol durch Umsetzung von 2,5-Diamino-4,6-dichlorpyrimidin mit 3-Amino-5-(hydroxymethyl)-cyclopentan-1,2-diol in Butanol. M. W. Andersen et al. (Tetrahedron Letters, 1996, 37, 8147-50) beschreiben die Herstellung von Anhydrohexitolnukleosiden. M. Legraverend et al. (Synthesis, 1990, 587-589) describe the preparation of 3- (2,5-diamino-6-chloropyrimidin-4-yl) amino-5- (hydroxymethyl) cyclopentan-1,2-diol Reaction of 2,5-diamino-4,6-dichloropyrimidine with 3-amino-5- (hydroxymethyl) cyclopentane-1,2-diol in butanol. M. W. Andersen et al. (Tetrahedron Letters, 1996, 37, 8147-50) describe the preparation of anhydrohexitol nucleosides.

Aufgabe der vorliegenden Erfindung ist es, ein 1-stufiges und damit kostengünstigeres Verfahren zur Herstellung von 4-[(2',5'-Diamino-6'-halogenpyrimidin-4'yl)amino]cyclopent-2-enylmethanolen zur Verfügung zu stellen, wobei die gewünschten Produkte in guter Ausbeute erhalten werden.The object of the present invention is to provide a 1-stage and therefore less expensive Process for the preparation of 4 - [(2 ', 5'-diamino-6'-halogenopyrimidin-4'yl) amino] cyclopent-2-enylmethanols to provide, the desired ones Products can be obtained in good yield.

Diese Aufgabe wird mit dem Verfahren gemäss Anspruch 1 gelöst.This object is achieved with the method according to claim 1.

Überraschenderweise wurde gefunden, dass wenn man anstatt 2-Amino-4,6-dichlorpyrimidin als Ausgangsmaterial ein 2,5-Diamino-4,6-dihalogenpyrimidin der allgemeinen Formel

Figure 00020001
verwendet und dieses in Gegenwart eines Alkali- oder Erdalkalimetallcarbonats oder eines Alkali- oder Erdalkalimetallhydrogencarbonats als Base in einem polar protischen Lösungsmittel mit einem 4-Aminocyclopent-2-enylmethanol der Formel
Figure 00020002
oder einem Salz davon reagieren lässt, das gewünschte Endprodukt der allgemeinen Formel
Figure 00020003
um ein Vielfaches kostengünstiger und in guter Ausbeute erhalten wird. Surprisingly, it was found that if instead of 2-amino-4,6-dichloropyrimidine as starting material, a 2,5-diamino-4,6-dihalopyrimidine of the general formula
Figure 00020001
used and this in the presence of an alkali or alkaline earth metal carbonate or an alkali or alkaline earth metal bicarbonate as a base in a polar protic solvent with a 4-aminocyclopent-2-enylmethanol of the formula
Figure 00020002
or a salt thereof, the desired end product of the general formula
Figure 00020003
is obtained many times cheaper and in good yield.

Der Substituent X bedeutet ein Halogenatom wie F, Cl, Br oder I.The substituent X represents a halogen atom such as F, Cl, Br or I.

Die 2,5-Diamino-4,6-dihalogenpyrimidine wie das 2,5-Diamino-4,6-dichlorpyrimidin können gemäss der EP-A-0 684 236 hergestellt werden.The 2,5-diamino-4,6-dihalopyrimidines such as the 2,5-diamino-4,6-dichloropyrimidine can be prepared according to EP-A-0 684 236.

Als 4-Aminocyclopent-2-enylmethanole können sowohl die racemischen als auch die optisch aktiven Verbindungen wie die (1R,4S)-, (1S,4R)-, (1R,4R)-, oder (1S,4S)-4-Aminocyclopent-2-enylmethanole eingesetzt werden. Geeignete Salze davon sind Säureadditionssalze, insbesondere die Hydrohalogenidsalze, beispielsweise die Hydrochloride oder Hydrobromide. Die 4-Aminocyclopent-2-enylmethanole, insbesondere das (1R,4S)- oder das (1S,4R)-Enantiomere, können gemäss der WO 97/45529 hergestellt werden.As the 4-aminocyclopent-2-enylmethanols, both the racemic and the optically active compounds such as the (1R, 4S) -, (1S, 4R) -, (1R, 4R) -, or (1S, 4S) -4-aminocyclopent-2-enylmethanols be used. Suitable salts thereof are Acid addition salts, especially the hydrohalide salts, for example the Hydrochloride or hydrobromide. The 4-aminocyclopent-2-enylmethanols, in particular the (1R, 4S) or (1S, 4R) enantiomer can be prepared according to WO 97/45529 become.

Die Umsetzung wird in Gegenwart eines Alkali- oder Erdalkalimetallcarbonats oder eines Alkali- oder Erdalkalimetallhydrogencarbonats als Base durchgeführt. Als Alkalimetallcarbonat bzw. Alkalimetallhydrogencarbonat können Natrium- und Kaliumcarbonat oder Natrium- oder Kaliumhydrogencarbonat eingesetzt werden. Als Erdalkalimetallcarbonat bzw. Erdalkalimetallhydrogencarbonat können Calcium- oder Magnesiumcarbonat oder Calciumhydrogencarbonat eingesetzt werden. Vorzugsweise wird die Umsetzung in Gegenwart eines Alkalimetallhydrogencarbonats wie Natriumhydrogencarbonat durchgeführt.The reaction is carried out in the presence of an alkali or alkaline earth metal carbonate or Alkali or alkaline earth metal bicarbonate carried out as a base. As Alkali metal carbonate or alkali metal bicarbonate can sodium and Potassium carbonate or sodium or potassium hydrogen carbonate can be used. As Alkaline earth metal carbonate or alkaline earth metal hydrogen carbonate can calcium or Magnesium carbonate or calcium hydrogen carbonate can be used. Preferably the reaction in the presence of an alkali metal bicarbonate such as Sodium bicarbonate performed.

Die Base wird zweckmässig im Überschuss bezogen auf das 2,5-Diamino-4,6-dihalogenpyrimidin eingesetzt, vorzugsweise werden 1 bis 4 mol Base pro mol 2,5-Diamino-4,6-dihalogenpyrimidin eingesetzt.The base is advantageously used in excess based on the 2,5-diamino-4,6-dihalopyrimidine used, preferably 1 to 4 mol base per mol 2,5-diamino-4,6-dihalopyrimidine used.

Als polar protische Lösungsmittel sind insbesondere C1-4-Alkohole wie Methanol, Ethanol, Propanol ISOPZOPYLALKOHOL und Butanol und seine Isomere geeignet.Particularly suitable polar protic solvents are C 1-4 alcohols such as methanol, ethanol, propanol ISOPZOPYL ALCOHOL and butanol and its isomers.

Zweckmässig wird die Umsetzung bei einer Temperatur von 20 °C bis zur Rückflusstemperatur des entsprechenden Lösungsmittels, vorzugsweise von 50 °C bis zur Rückflusstemperatur, durchgeführt. Zweckmässig werden das 4-Aminocyclopent-2-enylmethanol und das 2,5-Diamino-4,6-dihalogenpyrimidin äquimolar eingesetzt.The reaction is expedient at a temperature of 20 ° C to Reflux temperature of the corresponding solvent, preferably from 50 ° C to Reflux temperature. The 4-aminocyclopent-2-enylmethanol are useful and the 2,5-diamino-4,6-dihalopyrimidine used equimolar.

Nach einer üblichen Umsetzungszeit von 2 bis 20 h können dann die Endprodukte gemäss Formel I, vorzugsweise das (1S,4R)-4-[(2',5'-Diamino-6'-halogenpyrimidin-4'-yl)-amino]cyclopent-2-enylmethanol, durch übliche Aufarbeitungsmethoden erhalten werden.After a customary reaction time of 2 to 20 hours, the end products can then be used according to Formula I, preferably the (1S, 4R) -4 - [(2 ', 5'-diamino-6'-halopyrimidin-4'-yl) amino] cyclopent-2-enylmethanol, can be obtained by conventional workup methods.

Beispielexample Herstellung von 4-[(2',5'-Diamino-6'-chlorpyrimidin-4'-yl)amino]cyclopent-2-enylmethanol in Gegenwart von NatriumhydrogencarbonatPreparation of 4 - [(2 ', 5'-diamino-6'-chloropyrimidin-4'-yl) amino] cyclopent-2-enylmethanol in the presence of sodium hydrogen carbonate

(1S,4R)-4-Aminocyclopent-2-enylmethanolhydrochlorid (0,14 mol, 23,25 g), Ethanol (3 mol, 138,12 g, 176 ml), 2,5-Diamino-4,6-dichlorpyrimidin (0,14 mol, 25 g) und Natriumhydrogencarbonat (0,34 mol, 28,68 g) wurden in einen trockenen Reaktor gegeben. Diese Mischung wurde bis zur Rückflusstemperatur (ca. 80 °C) 16 h lang erhitzt. Die Umsatzrate wurde gemäss TLC mit 13/1 Methylenchlorid : Methanol als Laufinittel getestet. Die Reaktionsmischung wurde auf Raumtemperatur abgekühlt und 45 min lang gerührt. Die Salze wurden durch Filtration entfernt und der Filterkuchen 2-MAL mit Ethanol (0,86 mol, 39,5 g, 50 ml) gewaschen.(1S, 4R) -4-aminocyclopent-2-enylmethanol hydrochloride (0.14 mol, 23.25 g), ethanol (3 mol, 138.12 g, 176 ml), 2,5-diamino-4,6-dichloropyrimidine (0.14 mol, 25 g) and Sodium bicarbonate (0.34 mol, 28.68 g) was placed in a dry reactor. This mixture was heated to the reflux temperature (approx. 80 ° C.) for 16 hours. The Sales rate was according to TLC with 13/1 methylene chloride: methanol as eluent tested. The reaction mixture was cooled to room temperature and for 45 minutes touched. The salts were removed by filtration and the filter cake 2 times with ethanol (0.86 mol, 39.5 g, 50 ml).

Nachdem 2/3 der organischen Phase durch Vakuumdestillation entfernt waren, wurde tropfenweise Hexan (150 ml) hinzugefügt. Die Suspension wurde auf unter 10 °C gekühlt. Nach Filtration wurde im Vakuum bei 50 °C getrocknet.After 2/3 of the organic phase was removed by vacuum distillation, was Dropwise hexane (150 ml) added. The suspension was cooled to below 10 ° C. After filtration, it was dried in vacuo at 50 ° C.

Es wurden 21,5 g (0,08 mol) Endprodukt, entsprechend einer Ausbeute von 60 %, erhalten.21.5 g (0.08 mol) of end product, corresponding to a yield of 60%, were obtained.

Claims (3)

  1. Process for preparing 4-[(2',5'-diamino-6'-halopyrimidin-4'-yl)amino)cyclopent-2-enylmethanols of the general formula
    Figure 00070001
    in which X is a halogen atom, characterized in that a 2,5-diamino-4,6-dihalopyrimidine of the general formula
    Figure 00070002
    in which X is defined as above, is reacted with a 4-aminocyclopent-2-enylmethanol of the formula
    Figure 00070003
    or one of its salts, in the presence of an alkali metal carbonate or alkali earth metal carbonate or in the presence of an alkali metal bicarbonate or alkali earth metal bicarbonate, in a polar protic solvent to give the end product of the general formula I.
  2. Process according to Claim 1, characterized in that the polar protic solvent used is a C1-4-alcohol.
  3. Process according to Claims 1 or 2, characterized in that the reaction is carried out at a temperature of from 20°C to the reflux temperature of the solvent in question.
EP99971416A 1998-10-30 1999-10-29 Method for producing 4-[(2',5'- diamino-6'- halopyrimidine- 4'-yl)amino]- cyclopent- 2-enylmethanols Expired - Lifetime EP1124805B1 (en)

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EP98120529 1998-10-30
EP98120529 1998-10-30
US14610599P 1999-07-29 1999-07-29
US146105P 1999-07-29
PCT/EP1999/008270 WO2000026193A1 (en) 1998-10-30 1999-10-29 Method for producing 4- [(2',5'- diamino-6'- halopyrimidine- 4'-yl)amino]- cyclopent- 2-enylmethanols
EP99971416A EP1124805B1 (en) 1998-10-30 1999-10-29 Method for producing 4-[(2',5'- diamino-6'- halopyrimidine- 4'-yl)amino]- cyclopent- 2-enylmethanols

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US6433170B1 (en) 1998-10-30 2002-08-13 Lonza Group Method for producing 4-[2',5'-diamino-6'-halopyrimidine-4'-yl)amino]- cyclopent-2-enylmethanols
JP4611444B2 (en) 2007-01-10 2011-01-12 イステイチユート・デイ・リチエルケ・デイ・ビオロジア・モレコラーレ・ピ・アンジエレツテイ・エツセ・ピー・アー Amide substituted indazoles as poly (ADP-ribose) polymerase (PARP) inhibitors
ES2548131T3 (en) 2008-01-08 2015-10-14 Merck Sharp & Dohme Limited Pharmaceutically acceptable salts of 2- {4 - [(3S) -piperidin-3-yl] phenyl} -2H-indazol-7-carboxamide
CN103626745B (en) * 2013-12-04 2016-02-24 青岛黄海制药有限责任公司 A kind of preparation method of ticagrelor midbody

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NL8900122A (en) * 1988-01-20 1989-08-16 Univ Minnesota DIDEOXYNUCLEOSIDES ANTI-VIRUSES AND PREPARATIONS CONTAINING THEM.
GB8916698D0 (en) * 1989-07-21 1989-09-06 Beecham Group Plc Novel process
MY104575A (en) * 1989-12-22 1994-04-30 The Wellcome Foundation Ltd Therapeutic nucleosides.
CA2145928C (en) * 1994-04-27 2007-10-09 Gerhard Stucky N-(2-amino-4,6-dichloropyrimidin-5-yl)formamide, and a process for its preparation
DE59712095D1 (en) * 1996-05-30 2004-12-30 Lonza Ag Visp METHOD FOR PRODUCING AMINO ALCOHOLS AND DERIVATIVES THEREOF

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HUP0104045A2 (en) 2002-05-29
CZ300155B6 (en) 2009-02-25
IL142760A0 (en) 2002-03-10
SK5692001A3 (en) 2001-12-03
SK285271B6 (en) 2006-10-05
CZ20011486A3 (en) 2001-10-17
AU1158000A (en) 2000-05-22
PL198180B1 (en) 2008-06-30
JP2003500333A (en) 2003-01-07
IL142760A (en) 2005-12-18
ATE240945T1 (en) 2003-06-15
PL347503A1 (en) 2002-04-08
WO2000026193A1 (en) 2000-05-11
ES2200594T3 (en) 2004-03-01
EP1124805A1 (en) 2001-08-22
HUP0104045A3 (en) 2002-07-29
CA2348374A1 (en) 2000-05-11
CN1115338C (en) 2003-07-23
CA2348374C (en) 2009-04-07

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